diff --git a/nixos/modules/monitoring/server/grafana.nix b/nixos/modules/monitoring/server/grafana.nix
index 7ce9eaef664beed48cd13644f1915c6fd088b3e9..9ff69194cde31c5ef82966dfb2e28ed01a757fe1 100644
--- a/nixos/modules/monitoring/server/grafana.nix
+++ b/nixos/modules/monitoring/server/grafana.nix
@@ -118,9 +118,9 @@ in {
           enabled = true;
           # Grafana considers it "sign up" to let in a user it has
           # never seen before.
-          allowSignUp = true;
-          clientSecretFile = cfg.googleOAuthClientSecretFile;
-          clientId = cfg.googleOAuthClientID;
+          allow_sign_up = true;
+          client_secret_file = cfg.googleOAuthClientSecretFile;
+          client_id = cfg.googleOAuthClientID;
         };
 
         # Give users that come through GSuite SSO the highest possible privileges: